Robots perform during the 2018 PyeongChang Winter Olympic Games closing ceremony at PyeongChang Olympic Stadium, PyeongChang, South Korea, on Feb 25. The robots were developed by SIASUN Robot and Automation Company, a high-tech company based in Shenyang, Liaoning province. [Photo/Xinhua]

China.dayli.com.cn, by Cheng Yu and Ma Si,Updated: 2018-02-27

With dazzling lights, a group of 24 mobile robots "danced" to music with performers in an eight-minute high-tech show on Sunday at the closing ceremony of the 2018 Pyeongchang Winter Olympics.It was one of the world's first live performances involved such a large-scale mobile robot team and human dancers."The biggest difficulty is that robots are expected to perform a variety of complicated moves and be in line with the performers, lights and music," said Zhang Lei, who is responsible for developing these mobile robots at Siasun Robot & Automation Co Ltd.